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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/linux/tpm.h
2 * Copyright (C) 2004,2007,2008 IBM Corporation
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Dave Safford <safford@watson.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
9 * Debora Velarde <dvelarde@us.ibm.com>
11 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
13 * Device driver for TCG/TCPA TPM (trusted platform module).
14 * Specifications at www.trustedcomputinggroup.org
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation, version 2 of the
22 #ifndef __LINUX_TPM_H__
23 #define __LINUX_TPM_H__
25 #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
28 struct trusted_key_payload
;
29 struct trusted_key_options
;
32 TPM_OPS_AUTO_STARTUP
= BIT(0),
35 struct tpm_class_ops
{
37 const u8 req_complete_mask
;
38 const u8 req_complete_val
;
39 bool (*req_canceled
)(struct tpm_chip
*chip
, u8 status
);
40 int (*recv
) (struct tpm_chip
*chip
, u8
*buf
, size_t len
);
41 int (*send
) (struct tpm_chip
*chip
, u8
*buf
, size_t len
);
42 void (*cancel
) (struct tpm_chip
*chip
);
43 u8 (*status
) (struct tpm_chip
*chip
);
44 bool (*update_timeouts
)(struct tpm_chip
*chip
,
45 unsigned long *timeout_cap
);
46 int (*go_idle
)(struct tpm_chip
*chip
);
47 int (*cmd_ready
)(struct tpm_chip
*chip
);
48 int (*request_locality
)(struct tpm_chip
*chip
, int loc
);
49 int (*relinquish_locality
)(struct tpm_chip
*chip
, int loc
);
50 void (*clk_enable
)(struct tpm_chip
*chip
, bool value
);
53 #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
55 extern int tpm_is_tpm2(struct tpm_chip
*chip
);
56 extern int tpm_pcr_read(struct tpm_chip
*chip
, int pcr_idx
, u8
*res_buf
);
57 extern int tpm_pcr_extend(struct tpm_chip
*chip
, int pcr_idx
, const u8
*hash
);
58 extern int tpm_send(struct tpm_chip
*chip
, void *cmd
, size_t buflen
);
59 extern int tpm_get_random(struct tpm_chip
*chip
, u8
*data
, size_t max
);
60 extern int tpm_seal_trusted(struct tpm_chip
*chip
,
61 struct trusted_key_payload
*payload
,
62 struct trusted_key_options
*options
);
63 extern int tpm_unseal_trusted(struct tpm_chip
*chip
,
64 struct trusted_key_payload
*payload
,
65 struct trusted_key_options
*options
);
66 extern struct tpm_chip
*tpm_default_chip(void);
68 static inline int tpm_is_tpm2(struct tpm_chip
*chip
)
72 static inline int tpm_pcr_read(struct tpm_chip
*chip
, int pcr_idx
, u8
*res_buf
)
76 static inline int tpm_pcr_extend(struct tpm_chip
*chip
, int pcr_idx
,
81 static inline int tpm_send(struct tpm_chip
*chip
, void *cmd
, size_t buflen
)
85 static inline int tpm_get_random(struct tpm_chip
*chip
, u8
*data
, size_t max
)
90 static inline int tpm_seal_trusted(struct tpm_chip
*chip
,
91 struct trusted_key_payload
*payload
,
92 struct trusted_key_options
*options
)
96 static inline int tpm_unseal_trusted(struct tpm_chip
*chip
,
97 struct trusted_key_payload
*payload
,
98 struct trusted_key_options
*options
)
102 static inline struct tpm_chip
*tpm_default_chip(void)